Novel polymer-modified electrodes for batch injection sensors and application t...

• Autor(es): Brett, Christopher M. A. ; Fungaro, Denise A. ; Morgado, José M. ; Gil, M. Helena
• Data: 1999
• Identificador Persistente: http://hdl.handle.net/10316/5262
• Origem: Estudo Geral - Universidade de Coimbra
• Assunto(s): Anodic stripping voltammetry; Polymer-coated electrodes; Batch injection analysis; Environmental electroanalysis
• Tipo de Documento: Artigo
• Idioma: Inglês

Descrição

Various polymer coatings have been investigated for the protection of mercury thin-film electrodes in the square wave anodic stripping voltammetry of environmental samples using batch injection analysis, with injection of untreated samples of volume 50 [mu]l directly over the sensing electrode. Polymer coatings studied include those with controlled porosity, and cation-exchange polymers based on sulphonated polymers. Of the polymers tested, films of ca. 1 [mu]m thickness made from Nafion® mixed with 5% poly(vinyl sulphonic acid) were found to give the best results in tests with the model surfactants Triton-X-100 detergent, sodium dodecyl sulphate and protein standard. The validity of the approach is demonstrated by application to real samples. http://www.sciencedirect.com/science/article/B6TGB-3WS69WY-1G/1/482035fd36bbbdaace32d2213fe93529